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The impact of human forest disturbance on the endemic avifauna of the Udzungwa Mountains, Tanzania

Published online by Cambridge University Press:  11 May 2010

Jon Fjeldså
Jon Fjeldså
Affiliation:
Centre for Tropical Biodiversity, Zoological Museum, Universitetsparken 15, DK-2100 Copenhagen, Denmark email: [email protected]
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Studies of how avian communities are affected by human forest disturbance have given variable results. In order to focus conservation efforts we need comparative data for studying the relationship between community resilience and ecological predictability over much longer periods of time. This paper compares avian communities in mature forest and adjacent disturbed forest at a site in the Tanzania-Malawi Mountains which has probably had humid forest cover permanently since the Tertiary. At the same time the study presents a possible model design for such studies, which may be a suitable compromise between the needs for quantitative data and logistical constraints during exploratory visits to areas difficult of access. The method is highly time efficient as it is based on continuous recording of all birds during “random” walking through the forest. There were at least 70 species in disturbed, against 61–65 species in different kinds of adjacent mature forest, but with a marked loss of range-restricted species as we passed from mature to disturbed forest. Most seriously affected were birds of the shaded forest understorey, but also the larger insectivores of mixed canopy feeding parties declined. These species search for food in the masses of epiphytic lichens, mosses and ferns in mature forest canopies. Comments are given on the specific requirements of six species of conservation concern.

Type
Research Article
Information
Bird Conservation International , Volume 9 , Issue 1 , March 1999 , pp. 47 - 62
Copyright
Copyright © Birdlife International 1999

References

André, H. M. (1985) Associations between corticolous microarthropod communities and epiphytic cover on bark. Hol. Ecol. 8: 113–119.Google Scholar
Axelrod, D. I. and Raven, P. H. (1978) Late cretaceous and tertiary vegetation history of Africa. Pp. 77–130 in Werger, M. J. A., ed. Biogeogmphy and ecology of southern Africa. The Hague: Dr. W. Junk.CrossRefGoogle Scholar
Balmford, A. (1996) Extinction filters and current resilience: the significance of past selection pressure for conservation biology. TREE 11: 193–196.Google ScholarPubMed
Burgess, N. D., Fjeldså, J. and Botterweg, R. (in press a) The faunal importance of the Eastern Arc Mountains in Kenya and Tanzania. J. East Afr. Nat. Hist. Soc.Google Scholar
Burgess, N. D., de Klerk, H., Fjeldså, J. and Rahbek, C. (in press b) A preliminary assessment of congruence between biodiversity patterns in Afrotropical forest birds and forest mammals. Ostrich.Google Scholar
Canaday, C. (1997) Loss of insectivorous birds along a gradient of human impact in Amazonia. Biol. Conserv. 77: 63–77.CrossRefGoogle Scholar
Cloudsley-Thompson, J. L. (1969) The zoology of tropical Africa. London: Weidenfeld and Nicolson.Google Scholar
Colwell, R. K. and Coddington, J. A. (1994) Estimating terrestrial biodiversity through extrapolation. Phil. Trans. R. Soc. Lond. B 345: 101–118.Google ScholarPubMed
Cordeiro, N. (in press) Preliminary analyses of the nestedness patterns of montane forest birds in the Eastern Arc Mountains. J. East Afr. Nat. Hist. Soc.Google Scholar
Danielsen, F. (1997) Stable environments and fragile communities: does history determine the resilience of avian rain forest communities to habitat degradation? Biodiver. Conserv. 6: 423–434.CrossRefGoogle Scholar
Dinesen, L. (1995) Seasonal variation in feeding ecology of Shelley's greenbul in subtropical evergreen forests. Afr. J. Ecol. 33: 420–425.CrossRefGoogle Scholar
Dinesen, L. (1997) Succeshistorier blandt afrikanske regnskovsfugle. Naturens Verden 1997:178–186.Google Scholar
Dinesen, L., Lehmberg, T., Svendsen, J. O. and Hansen, L. A. (1993) Range extensions and other notes on some restricted-range forest birds from West Kilomberu in the Udzungwa Mountains, Tanzania. Scopus 17: 48–58.Google Scholar
Dinesen, L., Lehmberg, T., Svendsen, J. O., Hansen, L. A. and Fjeldså, J. (1994) A new genus and species of perdicine bird (Phasianidae, Perdicini) from Tanzania; a relict form with Indo-Malayan affinities. Ibis 136: 2–11.CrossRefGoogle Scholar
Fjeldså, J. (in press) Forest cover and summary endemism in the Eastern Arc Mountains of Tanzania, 1997. The Arc J.Google Scholar
Fjeldså, J. and Rabøl, J. (1995) Variation in avian communities between isolated units of the Eastern Arc Montane Forests, Tanzania. Gerfaut 85: 3–18.Google Scholar
Fjeldså, J. and Lovett, J. C. (1997) Biodiversity and environmental stability. Biodiver. Conserv. 6: 315–323.CrossRefGoogle Scholar
Fjeldså, J., Ehrlich, D., Lambin, E. and Prins, E. (1997) Are biodiversity “hotspots” correlated with current ecoclimatic stability? A pilot study using the NOAA-AVHRR remote sensing data. Biodiver. Conserv. 6: 401–422.CrossRefGoogle Scholar
Gunnarsson, B. (1992) Fractal dimension of plants an body size distribution in spiders. Fund. Ecol. 6: 636–641.CrossRefGoogle Scholar
Hamilton, A. C. (1982) Environmental history of East Africa. A study of the Quaternary. London: Academic Press.Google Scholar
Jensen, F. P. (1983) A new species of sunbird from Tanzania. Ibis 125: 447–449.CrossRefGoogle Scholar
Jensen, F. P. and Brøgger-Jensen, S. (1992) The forest avifauna of the Uzungwa Mountains, Tanzania. Scopus 15: 65–83.Google Scholar
Laurance, W. F. and Bierregaard, R. O. Jr. (1997) Tropical forest remnants. Ecology, management, and conservation of fragmented communities. Chicago: Chicago University Press.Google Scholar
Lovett, J. C. and Congdon, T. C. E. (1989) Notes on the Ihan'gana Forest and Luhega forest near Uhafiwa Mountains, Tanzania. J. East Afr. Nat. Hist. Soc. 19: 30–31.Google Scholar
Lovett, J. C. and Pócs, T. (1993) Assessment of the conditions of the catchment forest reserves, a botanical appraisal. Dar es Salaam: Ministry of Tourism, Natural Resources and Environment.Google Scholar
Lovett, J. C. and Wasser, S. K. (1993) Biogeography and ecology of the rain forests of eastern Africa. Cambridge, U.K.: Cambridge University Press.CrossRefGoogle Scholar
Lovett, J. C., Hatton, J., Mwasumbi, L. B. and Gerstle, J. C. (1997) Assessment of the impact of the Lower Kihansi Hydropower Project on the forests of Kihansi Gorge, Tanzania. Biodiver. Conserv. 6: 915–934.CrossRefGoogle Scholar
Magurran, A.M. (1988) Ecological diversity and its measurement. London: Chapman & Hall.CrossRefGoogle Scholar
Maley, J. (1989) Late quaternary climatic changes in the African rain forest: forest refugia and the major role of sea surface temperature variations. Pp. 585–616 in M., Leinen and M., Sarnthein, eds. Paleoclimatology and paleometeorology: modern and past patterns of global atmospheric transport. NATO Adv. Sci. Inst. Ser. 282. Dortrecht: Kluwer.CrossRefGoogle Scholar
McKinnon, J. and Phillipps, K. (1993) A field guide to the birds of Borneo, Sumatra, Java and Bali. Oxford: Oxford University Press.CrossRefGoogle Scholar
Moyer, D. (1993) A preliminary trial of territory mapping for estimating bird densities in afromontane forest. Proc 8th Pan-African Orn. Congr.: 302–311.Google Scholar
Nadkarni, N. M. and Matelson, T. J. (1989) Bird use of epiphyte resources in neotropical trees. Condor 91: 891–907.CrossRefGoogle Scholar
Newmark, W.D. (1993) Tropical forest fragmentation and the local extinction of understory birds in the East Usambara Mountains, Tanzania. Conserv. Biol. 5: 67–78.CrossRefGoogle Scholar
Nicholson, S. E. (1994) Recent rainfall fluctuations in Africa and their relationship to past conditions over the continent. Holocene 4: 121–131.CrossRefGoogle Scholar
Nummelin, M. and Hanski, I. (1989) Dung beetles of the Kibale Forest, Uganda: comparison between virgin and managed forests. J. Trap. Ecol. 5: 349–352.CrossRefGoogle Scholar
Pettersson, R. B., Ball, J. P., Renhorn, K-E., Esseen, P-A. and Sjöberg, K. (1995) Invertebrate communities in boreal forest canopies as influenced by forestry and lichens with implications for passerine birds. Biol, Conserv. 74: 57–63.CrossRefGoogle Scholar
Pócs, T. (1974) Bioclimatic studies in the Uluguru mountains (Tanzania, East Africa). Acta Bot. Acad. Sci. Hung. 20: 115–135.Google Scholar
Poulsen, B.O., Krabbe, N., Frølander, A., Hinojosa, M. B. and Quiroga, C. O. (1997) A rapid assessment of Bolivian and Ecuadorian montane avifaunas using 20-species lists: efficiency, biases and data gathered. Bird Conserv. Internatn. 7: 53–68.CrossRefGoogle Scholar
Prell, W. L., Hutson, W. H., Williams, D. F., Bé, A. W. H., Geitzenauer, K. and Holfino, B. (1980) Surface circulation of the Indian Ocean during the Last Glacial Maximum, approximately 18000 yr BP. Quatern Res. 14: 309–336.CrossRefGoogle Scholar
Remsen, J. V. and Good, D. A. (1996) Misuse of data from mist-net captures to assess relative abundance in bird populations. Auk 113: 381–398.CrossRefGoogle Scholar
Restrepo, C., Renjifo, L. M. and Marples, P. (1997) Frugivorous birds in fragmented Neotropical montane forests: landscape pattern and body mass distribution. Pp. 171–189 in Laurance, W. F. and Bierregaard, R. O., eds. Tropical forest remnants. Ecology, management, and conservation of fragmented communities. Chicago: Chicago University Press.Google Scholar
Rosenberg, K. V. (1990) Dead-leaf foraging specialization in tropical forest birds: measuring resource availability and use. Pp. 360–8 in Morrison, M. L., Ralph, C. J., Verner, J., and Jehl, J. R. Jr., eds. Avian foraging: theory, methodology, and applications. Stud. Avian Biol. 13: 360–368.Google Scholar
Roy, M. S., Arctander, P. and Fjeldså, J. (1998). Speciation and taxonomy of montane greenbuls of the genus Andropadus (Aves: Pycnonotidae). Steenstrupia 24: 51–66.Google Scholar
Snow, D. W. (1976) The web of adaptation: bird studies in the American tropics. New York: Quadrangle, Times Book Co.Google Scholar
Stattersfield, A. J., Crosby, M. J., Long, A. J. and Wege, D. C. (1998) Endemic bird areas of the world. Priorities for biodiversity conservation. Cambridge, U.K.: BirdLife International.Google Scholar
Stuart, S. N. and Turner, D. A. (1980) Some range extensions and other notable records of forest birds from eastern and northeastern Tanzania. Scopus 4: 36–41.Google Scholar
Stuart, S. N., Howell, K. M., van der Willigen, T. A. and Geertsema, A. A. (1981) Some additions to the forest avifauna of the Uzungwa mountains, Tanzania. Scopus 5: 46–50.Google Scholar
Terborgh, J., Robinson, S. K., Parker, T. A. III, Munn, C. A. and Pierpont, N. (1990) Structure and organization of an Amazonian forest bird community. Ecol. Monogr. 60: 213–238.CrossRefGoogle Scholar
Usher, M.B., ed. (1986) Wildlife conservation evaluation. London: Chapman and Hall.CrossRefGoogle Scholar
Williams, P. H. (1994) WORLDMAP. Priority areas for biodiversity. User version 3. Privately distributed computer software and manual, London, U.K.Google Scholar